紫外光照下改性A-TiO2降解番红花红T  

Photocatalytic Degradation of Safranin T by the Modified A-TiO Under Ultraviolet Light

作　　者：张一兵 陈楠 ZHANG Yi-bing;CHEN Nan(School of Chemistry and Environmental Science,Shangrao Normal University,Shangrao 334001,Jiangxi,China;Jiangxi Province Key Laboratory of Plastic Preparation and Molding,Shangrao 334001,Jiangxi,China)

机构地区：[1]上饶师范学院化学与环境科学学院,江西上饶334001 [2]江西省塑料制备成型重点实验室,江西上饶334001

出　　处：《矿冶工程》2020年第3期133-137,共5页Mining and Metallurgical Engineering

基　　金：教育部第四批高等学校特色专业建设点资助项目(TS11524);江西省精品课程资助项目(赣教高字[2011]74号);江西省精品资源共享课资助项目(赣教高字[2015]79号)。

摘　　要：用水热法制备了掺Fe^3+改性TiO2粉末,通过XRD对其结构进行了表征,并研究了在紫外光照下该掺Fe^3+改性TiO2对番红花红T的催化降解效果。结果表明:TiO2晶体属于纯锐钛矿型(A-TiO2);优化降解条件为:番红花红T溶液初始浓度15 mg/L,pH=5,5%掺Fe^3+量的A-TiO2用量4 g/L,16℃下经254 nm照射反应55 min,该条件下番红花红T降解率59.5%;相同优化条件下进行暗吸附,30 min达到吸附平衡,A-TiO2对番红花红T平衡吸附量2.02 mg/g。番红花红T降解率与吸附率基本正相关。After the Fe^3+doped TiO2 powder was prepared by hydrothermal method,its structure was characterized by XRD and the photo-catalytic degradation of the safranin T by the modified TiO2 under ultraviolet light was studied.The results show that the crystal of the prepared TiO2 is of pure anatase(A-TiO2).The degradation rate of the safranin T reached 59.5%under the following optimized degradation conditions,including an initial concentration of safranin T at 15 mg/L,pH of 5,5%Fe^3+doped A-TiO2 at an amount of 4 g/L,radiation for 55 min at uv-light(254 nm)at 16℃.The adsorption without light was performed under the same optimized conditions,showing an adsorption equilibrium being reached within 30 min.The equilibrium adsorption capacity of A-TiO2 for safranin T was 2.02 mg/g.It is shown that the degradation rate of safranin T is almost positively correlated with the adsorption rate.

关 键 词：二氧化钛 番红花红T 掺杂 铁离子 改性A-TiO2 光催化 降解 暗吸附 

分 类 号：X131.2[环境科学与工程—环境科学]